An equation of state describing the critical region: extension to high pressure

A parametric equation of state was derived for water and water vapor in the critical region from experimental P-V-T data. It is valid in that part of the critical region encompassed by pressures from 3000 to 4000 psia, specific volumes from 0.0400 to 0.1100 ft3/lb, and temperatures from 698 to 752 deg F. The equation of state satisfies all of the known conditions at the critical point. It also satisfies the conditions along certain of the boundaries which probably separate “supercritical liquid” from “supercritical vapor.” The equation of state, though quite simple in form, is probably superior to any equation heretofore derived for water and water vapor in the critical region. Specifically, the deviations between the measured and computed values of pressure in the large majority of the cases were within three parts in one thousand. This coincides approximately with the overall uncertainty in P-V-T measurements. In view of these factors, the author recommends that the equation be used to derive values for such thermodynamic properties as specific heat at constant pressure, enthalpy, and entropy in the critical region.

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Equation of state studies at SILP by laser-driven shock waves

Laser and Particle Beams ◽

10.1017/s0263034600009915 ◽

1996 ◽

Vol 14 (2) ◽

pp. 157-169 ◽

Cited By ~ 8

Author(s):

Yuan Gu ◽

Sizu Fu ◽

Jiang Wu ◽

Songyu Yu ◽

Yuanlong Ni ◽

...

Keyword(s):

Shock Wave ◽

High Pressure ◽

Equation Of State ◽

Shock Waves ◽

Target Surface ◽

Shock Adiabats ◽

Pressure Shock ◽

Aluminum Target ◽

Laser Illumination ◽

The Stability

The experimental progress of laser equation of state (EOS) studies at Shanghai Institute of Laser Plasma (SILP) is discussed in this paper. With a unique focal system, the uniformity of the laser illumination on the target surface is improved and a laser-driven shock wave with good spatial planarity is obtained. With an inclined aluminum target plane, the stability of shock waves are studied, and the corresponding thickness range of the target of laser-driven shock waves propagating steadily are given. The shock adiabats of Cu, Fe, SiO2 are experimentally measured. The pressure in the material is heightened remarkably with the flyer increasing pressure, and the effect of the increasing pressure is observed. Also, the high-pressure shock wave is produced and recorded in the experimentation of indirect laser-driven shock waves with the hohlraum target.

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High pressure-temperature phase diagram and equation of state of titanium

Physical Review B ◽

10.1103/physrevb.91.134108 ◽

2015 ◽

Vol 91 (13) ◽

Cited By ~ 23

Author(s):

Agnès Dewaele ◽

Vincent Stutzmann ◽

Johann Bouchet ◽

François Bottin ◽

Florent Occelli ◽

...

Keyword(s):

Phase Diagram ◽

High Pressure ◽

Equation Of State ◽

Temperature Phase ◽

Temperature Phase Diagram

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A time-dependent model for high-pressure discharges in narrow ablative capillaries

Journal of Plasma Physics ◽

10.1017/s0022377800026908 ◽

1993 ◽

Vol 50 (1) ◽

pp. 51-70 ◽

Cited By ~ 19

Author(s):

D. Zoler ◽

S. Cuperman ◽

J. Ashkenazy ◽

M. Caner ◽

Z. Kaplan

Keyword(s):

High Pressure ◽

Equation Of State ◽

Time Dependent ◽

Dimensional Model ◽

Plasma Sources ◽

One Dimensional ◽

Space And Time ◽

Dependent Model ◽

Energy Equations ◽

Time Dependent Model

A time-dependent quasi-one-dimensional model is developed for studying high- pressure discharges in ablative capillaries used, for example, as plasma sources in electrothermal launchers. The main features of the model are (i) consideration of ablation effects in each of the continuity, momentum and energy equations; (ii) use of a non-ideal equation of state; and (iii) consideration of space- and time-dependent ionization.

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